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Finding the Fourth Proportional to 111,907.50, 154,432.35 and 61,606.50

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Solution

The fourth proportional to 111,907.50, 154,432.35 and 61,606.50 is: 85,016.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,907.50 : 154,432.35 = 61,606.50 : x
  2. Step 2: Convert to fraction form
    111,907.50/154,432.35 = 61,606.50/x
  3. Step 3: Cross multiply
    111,907.50x = 154,432.35 × 61,606.50
  4. Step 4: Simplify right side
    111,907.50x = 9,514,036,570.28
  5. Step 5: Solve for x
    x = 9,514,036,570.28/111,907.50
  6. Step 6: Final answer
    x = 85,016.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.